Molding machine



June,l2, 1923.

J. STONE ET AL MOLDING MACHINE 2 Sheets-Sheet 1 Filed June 1 1922 June 12,1923; 7 1,458,897

J. STONE ET AL MOLDING MACHINE FiledJune 1, 1922 2 Sheets-Sheet '2 v Taazzwhm' a may concern;

Patented June 12, 1923.

I i Application .filed'fl'unexl,

Beit: kIlOWIl jt-hflt. weydosnrrr STONE and 131 3 GQPERRY; citizens of the UnitedStates, residing"atBessem r, in .thejcounty of Jetferson and State of Alabama, have inventxed; certain new andnseful lmproyements in Molding; Machines, of which'thejfollowjing: is ,a specification, reference being hadtherein to theaccompanying drawings. I 3

. ,,This. invention 'relatesg-to 1nolding niachinesiand it has ,forits object the-provision o'ffaamechanism whereby sand. is dis charged by centrifugaljforce-and withsuch velocity intotheflaskof a molding machine as to cause the firm compacting ofithe sand within the flask and without any tamping upon the part of. the molderi Itisfafurtherobject of the inventionto so associate a flask support with the centrifugal sand discharging apparatus of the character indicated as to permitof the ready withdrawal of the flask support and flask and the substitution ofanother flask, so that the flask may be quickly'returned to position to receive more sand from the centrifugal sand. discharging device. 1

Further objects and advantages of the i11- vention will beset forth in the detailed description whichfollows.

In the accompanying drawings: Fig. 1 is a view partly in longitudinal section of a machine constructed in accordance with the invention;

Fig. 2 is a view in transverse vertical section of the machine illustratedin Fig.

1; and

Fig. 3 is a detail viewof a shakerbar hereinafter described.

Like numerals designate corresponding parts throughout the several figures of the drawings.

' Referring to the drawings it will be seen that this improved molding machine com: prises a fra-me'consisting' of the end plates .5 which are tied together by the longitudinally extending fixed cylinders 6. The end frame members, 5 are supported upon trackwheels 7 and said track wheels travel upon rails 8 so that the machine as a whole may be advanced toward a pile of sand to cause a conveyor 9 topick up sand from the pile and discharge it into a sand hopper '10. The sand is discharged from the sand hopper by means of chutes 11 through the,

sand inlet openings 12 of the fixed cylinbe lifted from the :carrier 18 and an empty- 1922.. serial Nor-sealer. i

Y H ST I a a, m a a ame e.v-

ders 6, these cylinders the sand :1

is engaged by blades-l3 upon irotative drums 14. These drumsare caused ;to;- rotate at ,a, high rate ofspeedby means'of motors 15, as presently set forth and they act ,to hurl sand with great velocity through the openings '16 formed in'ithe lower :inner. sides i ofifthe fixed cylinders, 6 and to discharge the; said. sandwithgreat force into the flask 17 of aflask carrier 18. The shafts 1;9"of drums 14L carry pulleys-20jwhich aredriven by belts 21.:from1the motors-15. The-two drums 14 arecaused to rotate inopposite directions or inthe direction'of thearrows A, inl ig. 1. The flaskaicarrier 2.18 is pro: vided with wheels on rollers22which-travel upon ajtrackway 23v formed upoir-thei end frame members. 5'. the --construction-being, such'that the carrier may be moved to the position illustrated in Fig. 1 where it lies in position to receive the sand discharged.

by the blades 13, or may be moved 0u't-.

w-ardly to a position where the flask 17 may flask substituted therefor, after which the ing position. Movement of the carrier along the trackway 23 is effected by a hand wheel 24 which is in'ounted upon' a shaft 25,

said shaft'carrying gear wheels 26. which mesh withracks 27 of the carrier18;v

It is immaterial what particular shape of article is handled by the molding ma chine, since this molding machine may mold artlcles of varying sizesandjshap'es withsand hopper. 7 It may be delivered into this 5 hopper by hand without departure from carrier may be rolled back to sand receivjf the invention, the essential feature of the invention residing in the provision of a centrifugal discharge mechanism for hurling sand into amold with suflicientforce to compact the sand therein without'further tamping.

For controlling the flow ofsand from the i hopper we provide any de'sirednumber of v shaker bars 28 which constitutethe bottom m i of the hopper. These shaker bars project through the sides of the hopperand are connected to links 29 by which 'theyar'eisu'p-t Connecting'rods 30 are connected ported. v with upturned ends '31 of'the shaker bars and are actuated by eccentrics 32 on a shaft-.

33. This shaft may be connected at will by any conventional type of clutch 33 to a pulley 34 that is driven by a belt 35 or in any other way, from a part of the con veyor mechanism, the latter, in turn, being driven by a motor 88. By virtue of the provision of the clutch the movement of the shaker bars may be stopped to cause the flow of sand to cease when the flask is Withdrawn from beneath the cylinder 6. The shaker bars operate with a back and forth movement and when one bar is moving in one direction adjacent bars are moving in the opposite direction. Thus the sand is fed from the hopper into the cylinders 6.

It is, therefore, to be understood that the invention is notlimited to the precise construction set forth but that it includes within its purview whatever changes fairly come within either the terms or the spirit of the appended claims.

Having described our invention what We claim is:

1. In combination a wheeled frame, a pair of fixed cylinders thereon, a pair of rotative elements in said cylinders, asand hopper above said cylinders delivering sand into said cylinders, said cylinders having openings at their inner and lower sides, a trackway upon the frame and a flask carrier mounted upon the trackway formovement to bring it into and out of operative position with respect to said cylinders.

2. A structure as recited in claim 1 in combination with means for; causing the flask carrier to travel upon the tr-ackWa-y including manually operable gear wheels and straight line racks with which said gear wheels mesh. i i

'3. In combination a Wheeled frame, I a pair of fixed cylinders thereon, a pair of rotative' elements in said cylinders, a sand carried thereby beneath said cylinders or outwardly beyond said cylinders.

In testimony whereof We hereunto ailix our signatures.

JOSEPH sroNE. BEN e. PERRY. 

